seems you have a lot mixed up! Advise that you read all the links/blog that are given to you in your threads.
More importantly read Dataguard 11g documentation. http://docs.oracle.com/cd/E11882_01/server.112/e17022/concepts.htm#SBYDB00010

you still did not executed the commands exactly as it was posted nonetheless your standby role should not be primary.

Hope now the issue is rectified to some extend , the service name which I put in tnsnames.ora should be same as the service name which listner has allocated . After edited accordingly the ORA-12514 has gone (SERVICE_NAME=DGP_DGMGRL.oracledgr).